I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
idealless idealess ideals idlesse idles idealise idealize idylls idols idyls
idealless dalles wheatless sodaless roadless meatless dallies tailles tailless tallies toolless beatless fatless hatless headless heatless idealess coatless leadless matless retallies seatless toadless chadless